drivers/nrf24l01: Fix SPI phase setting to match specs of nRF chip.
drivers/nrf24l01: Fix SPI phase setting to match specs of nRF chip.

Addresses issue #1466.

mpalomer/micropython,ericsnowcurrently/micropython,orionrobots/micropython,tralamazza/micropython,dxxb/micropython,TDAbboud/micropython,AriZuu/micropython,kerneltask/micropython,adafruit/circuitpython,drrk/micropython,danicampora/micropython,adafruit/micropython,cloudformdesign/micropython,AriZuu/micropython,pfalcon/micropython,adafruit/circuitpython,supergis/micropython,hosaka/micropython,tobbad/micropython,feilongfl/micropython,jlillest/micropython,xhat/micropython,selste/micropython,bvernoux/micropython,misterdanb/micropython,vriera/micropython,ryannathans/micropython,Timmenem/micropython,matthewelse/micropython,dhylands/micropython,trezor/micropython,cwyark/micropython,infinnovation/micropython,adafruit/circuitpython,oopy/micropython,pozetroninc/micropython,bvernoux/micropython,dinau/micropython,emfcamp/micropython,pramasoul/micropython,dinau/micropython,henriknelson/micropython,tobbad/micropython,ChuckM/micropython,oopy/micropython,lowRISC/micropython,PappaPeppar/micropython,henriknelson/micropython,dinau/micropython,mianos/micropython,chrisdearman/micropython,tralamazza/micropython,HenrikSolver/micropython,PappaPeppar/micropython,pfalcon/micropython,dxxb/micropython,deshipu/micropython,cloudformdesign/micropython,Timmenem/micropython,mpalomer/micropython,micropython/micropython-esp32,jlillest/micropython,swegener/micropython,blmorris/micropython,hiway/micropython,ruffy91/micropython,bvernoux/micropython,xhat/micropython,galenhz/micropython,redbear/micropython,SHA2017-badge/micropython-esp32,MrSurly/micropython,mpalomer/micropython,micropython/micropython-esp32,kerneltask/micropython,adafruit/micropython,cloudformdesign/micropython,ganshun666/micropython,hiway/micropython,hosaka/micropython,adamkh/micropython,selste/micropython,HenrikSolver/micropython,lowRISC/micropython,xuxiaoxin/micropython,alex-march/micropython,mhoffma/micropython,bvernoux/micropython,oopy/micropython,mpalomer/micropython,praemdonck/micropython,ganshun666/micropython,noahwilliamsson/micropython,lowRISC/micropython,supergis/micropython,feilongfl/micropython,dinau/micropython,deshipu/micropython,pozetroninc/micropython,PappaPeppar/micropython,Peetz0r/micropython-esp32,pramasoul/micropython,oopy/micropython,mianos/micropython,MrSurly/micropython-esp32,noahwilliamsson/micropython,blmorris/micropython,orionrobots/micropython,alex-march/micropython,alex-march/micropython,adamkh/micropython,blazewicz/micropython,adafruit/circuitpython,redbear/micropython,adamkh/micropython,trezor/micropython,tobbad/micropython,EcmaXp/micropython,jlillest/micropython,puuu/micropython,SHA2017-badge/micropython-esp32,orionrobots/micropython,puuu/micropython,galenhz/micropython,chrisdearman/micropython,martinribelotta/micropython,alex-march/micropython,infinnovation/micropython,puuu/micropython,pfalcon/micropython,bvernoux/micropython,ericsnowcurrently/micropython,MrSurly/micropython-esp32,ruffy91/micropython,cwyark/micropython,redbear/micropython,xuxiaoxin/micropython,oopy/micropython,emfcamp/micropython,blmorris/micropython,adafruit/micropython,puuu/micropython,AriZuu/micropython,misterdanb/micropython,ernesto-g/micropython,neilh10/micropython,deshipu/micropython,supergis/micropython,mhoffma/micropython,henriknelson/micropython,galenhz/micropython,martinribelotta/micropython,tobbad/micropython,ericsnowcurrently/micropython,drrk/micropython,pfalcon/micropython,ryannathans/micropython,HenrikSolver/micropython,ericsnowcurrently/micropython,blazewicz/micropython,swegener/micropython,adafruit/circuitpython,toolmacher/micropython,toolmacher/micropython,turbinenreiter/micropython,mhoffma/micropython,emfcamp/micropython,ruffy91/micropython,MrSurly/micropython-esp32,mhoffma/micropython,adamkh/micropython,vitiral/micropython,danicampora/micropython,selste/micropython,MrSurly/micropython,Peetz0r/micropython-esp32,tralamazza/micropython,omtinez/micropython,Peetz0r/micropython-esp32,hosaka/micropython,TDAbboud/micropython,alex-robbins/micropython,mianos/micropython,pramasoul/micropython,selste/micropython,AriZuu/micropython,chrisdearman/micropython,ganshun666/micropython,ruffy91/micropython,torwag/micropython,dmazzella/micropython,turbinenreiter/micropython,adafruit/micropython,noahwilliamsson/micropython,MrSurly/micropython,xuxiaoxin/micropython,misterdanb/micropython,ernesto-g/micropython,praemdonck/micropython,deshipu/micropython,matthewelse/micropython,tuc-osg/micropython,matthewelse/micropython,danicampora/micropython,dxxb/micropython,misterdanb/micropython,danicampora/micropython,EcmaXp/micropython,mpalomer/micropython,SHA2017-badge/micropython-esp32,jmarcelino/pycom-micropython,drrk/micropython,PappaPeppar/micropython,SHA2017-badge/micropython-esp32,supergis/micropython,torwag/micropython,vriera/micropython,cloudformdesign/micropython,toolmacher/micropython,hiway/micropython,blazewicz/micropython,dinau/micropython,jlillest/micropython,martinribelotta/micropython,matthewelse/micropython,vriera/micropython,tuc-osg/micropython,dhylands/micropython,matthewelse/micro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